安装coloredlogs库,使用pip进行安装:
```
pip install coloredlogs
```
使用coloredlogs库的步骤如下:
1. 首先,如同正常打印日志一样,创建一个logger。使用`logging.basicConfig()`方法进行配置:
```python
import logging
logging.basicConfig()
logger = logging.getLogger(name='mylogger')
```
2. 然后,将logger安装到coloredlogs中:
```python
from coloredlogs import coloredlogs
coloredlogs.install(logger=logger)
logger.propagate = False
logger.propagate = False # 确保coloredlogs不会将我们的日志事件传递给根logger,这可以防止我们重复记录每个事件。
```
3. 如果想要为控制台输出添加一些样式,可以自定义一个coloredFormatter。例如:
```python
from coloredlogs import coloredlogs
coloredFormatter = coloredlogs.ColoredFormatter(
fmt='[%(name)s] %(asctime)s %(funcName)s %(lineno)-3d %(message)s',
level_styles=dict(
debug=dict(color='white'),
info=dict(color='blue'),
warning=dict(color='yellow', bright=True),
error=dict(color='red', bold=True, bright=True),
critical=dict(color='black', bold=True, background='red'),
),
field_styles=dict(
name=dict(color='white'),
asctime=dict(color='white'),
funcName=dict(color='white'),
lineno=dict(color='white'),
)
)
```
4. 最后,配置一个流处理器来显示日志在控制台上:
```python
import sys
ch = logging.StreamHandler(stream=sys.stdout)
ch.setFormatter(coloredFormatter) # 设置流处理器的格式化器为coloredFormatter
logger.addHandler(ch) # 将流处理器添加到logger中以便输出带有样式的日志信息到控制台
```pythonimport logging
import coloredlogs
import sys
# 配置 logger
logging.basicConfig()
logger = logging.getLogger(name='mylogger')
coloredlogs.install(logger=logger)
logger.propagate = False
# 配置颜色格式
coloredFormatter = coloredlogs.ColoredFormatter(
fmt='[%(name)s] %(asctime)s %(funcName)s %(lineno)-3d %(message)s',
level_styles=dict(
debug=dict(color='white'),
info=dict(color='blue'),
warning=dict(color='yellow', bold=True),
error=dict(color='red', bold=True),
critical=dict(color='black', bold=True, background='red')
)
)
# 将formatter添加到handler中并设置日志级别
ch = logging.StreamHandler()
ch.setFormatter(coloredFormatter)
logger.addHandler(hdlr=ch)
logger.setLevel(level=logging.DEBUG)
# 输出不同级别的日志信息
logger.debug('this is a debug message')
logger.info('this is an info message')
logger.warning('this is a warning message')
logger.error('this is an error message')
logger.critical('this is a critical message')
```
请将以下代码段重构为一个Python函数,并保持段落结构:
```python
import logging
import sys
from datetime import datetime
def colored_logging():
# 设置日志格式
fmt = logging.Formatter(
'%(asctime)s - %(name)s - %(levelname)s - %(message)s',
datefmt='%Y-%m-%d %H:%M:%S',
style='{',
field_styles=dict(
name=dict(color='white'),
asctime=dict(color='white'),
funcName=dict(color='white'),
lineno=dict(color='white')
)
)
# 配置 StreamHandler
ch = logging.StreamHandler(stream=sys.stdout)
ch.setFormatter(fmt=coloredFormatter)
logger.addHandler(hdlr=ch)
logger.setLevel(level=logging.DEBUG)
# output
logger.debug(msg='this is a debug message')
logger.info(msg='this is an info message')
logger.warning(msg='this is a warning message')
logger.error(msg='this is an error message')
logger.critical(msg='this is a critical message')
# 调用函数
colored_logging()
```